Haloplaca sorediella

Haloplaca sorediella is a species of saxicolous (rock-dwelling) crustose lichen in the family Teloschistaceae. It grows exclusively in maritime environments along the western coast of Great Britain. First described in 2006 by the Swedish lichenologist Ulf Arup as Caloplaca sorediella before being reclassified in 2013, it forms small yellow to orange-yellow patches on coastal rocks, plant debris, and at the base of shoreline plants. The lichen is distinguished by its dot-like soralia that produce fine powdery propagules (soredia) for reproduction, as no fruiting bodies have been observed in this species. It inhabits the upper shoreline zone just above the high tide mark in exposed locations across western England, Wales and Scotland, where it often grows alongside other coastal lichens....read more on Wikipedia.